I did actually mean Hotspot from the Protectobots. He would be the best choice for a repaint from this mold.
They've already done G1 combiner members like Strafe, Onslaught, Wildrider and Dragstrip and Hotspot would be a good choice if they wanted to use the Inferon/Grapple mold again.
I hadn't actually heard of load hauler or artfire until I checked your links. I wouldn't bother with artfire as I don't like his paint job, load hauler looks ok but think I would pass as I just don't have space for anything other than my favourite G1 characters/characters that were important.